Fourdrinier machine.



UNITED- STATES PATENT OFFICE.

ALBERT J. DAVIES, O.'E KENOGAMI, QUEBEC, GANAIDA.

EOUBDR INIER MACHINE.

Specification of Letters Patent.

Patehted Sept. 5, 1916,

Application filed January 1916. Serial N o.- 70,401.

T0 all wkom z't mag! ooncem Be it known that I, ALBERTJ. .DAVIES, of Kenogam-i, in the Province of Quebec, a citizen of the United States, and resio'ling at the above place in the Dominion of Cariada,

have invented certain new und useful Imahead of it, had a tendency to carr.y the screen 01 apron with it and thus cause the grooving 0f the forward -1ip of the box, with the undesirable consequences, at= that point, whichwere 'general ab all the boxes before the time of my invention described in the above patent. T0 o'vercome this tendency, I have conceived this present invention which includes me'ans for reciprocating the guide roll 0Ver whichthe sc1een passes' in its course from the last suction box 130 the couch roll and, by causing this reciprocation to oppose that of thelast box, I introduce cond'itions there 'that are similar to those at all the other boxeS for, as is well known, the' screenjtself is given slight vibratory motions at the breast roll, for the purpose of forming the sheet and 'thus the first box is met with the desirable counter-agitation behind it that I here provide, in a difierent manner, ahead of the for- Ward box.

In the -drawingswhich accompany' und. form part of this specification, Figure 1 is a di agram 0f a portion of a Fourdfinier m21- cl1ine. Fig. 2 is a cro ss elevation on line 22 0f Eig. l. Fig. 3 isa partial plan view of Fig. 2. F ig. 4 Shows a modification.

In the description which follows, the reference characters will, in general, follow the order giVen in my previous patent above mentioned, so that reference may couwniently b'e had to that patent.

Thus, 2 represents the shaker rail, 3 the dckle strap, 4 the feed 01 guide 1'011 to which my present invention is preferably applied, 5, 5 the couch rolls, 6, 7, 8, 9, 10 and 11 the suction boxes, the first inentioned, 6, being nearest the roll 4. The shaking bars 12 and 13 a1e best seen in Fig. 2, the general mounting being the same as in my above mentioned patent, the pivotal bearings being indicated i1t 14, Fig. 1.

T0 reciprocate box 6, which is attached to the bals 12 at 16 (Fig. 3), the same e ccex1tric 22, onshaft 23, has a 1'0d 21 pivotally Connected t0 the brace 18 at 20, this brace being fastened to the bars 12, as seen in Fig. 2.

.He1eafl:er the additional reference characters refer exclsively to the accompanying drawings.

Feed roll 4 is mounted at one end in a fixed bearing 25 on frame 1, the journal 26 being free to either turn or slide therein. At its opposite end, thejournal 27 is 10= tatably mount ed in a standatd 28 but is he1d again st sliding therein by a colla'r 29 fast on journal 2-7.

Standard 28 iS rigidly Supported on a shelf30 and this shelf is connected at 31 t0 a stifi' spring-platze 32 which is connected at 33 to a fl001' casting 34. A pivo tal mounting 35, atone side of she1f 30, affords connection to an eccentric 1'0d 36 and thene to the eccentric 37 on shaft 23.

The reciprocating movement. of roll 4 need be 'but slig"ht, in some cases legs than one. sixteenth part of an inch, so the sma-ll yield of plate32 will not appreciably aifect the alinement of journals 26 and 27, and the plate 32 may be sufficiently stifl" to ofler a satisfacto'ry standard', being aided, in this respect, by the eccentric rod support. The screen or aprn 38, having the usual forward motion, is thus adversely atfecte d by box 6 and roll 4 and any tendency t0 carry on the former is broken up.

In- Fig. 3 it will be noticed that box 7 is secured t0 shaking bar 13 ab 17, this bar being reciprocated by its eccentric '22, situilarly 150 bar 12 but in-the opposite direction, sothat the efiect, 011 screen 38, by the movement ofbox 6, is brok6n up or opposed 011 eachside by box 7 anal roll 4:.

Although I have, so far, trented und prefer t0 use this invention in connection with myprevious Patent N0. 1,090,974, it; will be iqS all; and this fact should be properly conside1ed in limiting the scope of this invention. F urthermore, f01 the purposes of this invention, roll 4 need not revo1ve, the essencial feature being a upport for the apron at the couch end of the machine. A pulley 40, seen in Fig. 2, Shows one means 0f transmitting power t0 shaft 23. The flexible suction tnbes a1e seen at il, Fig. l.

In Fig. 4, the bearing 2 receives journal 27 both rotatably and slidably, being itself fixed t0 frame l. An extension 50 0f journal 2T beaxs against a cam 51 fast on shaft 23, being held there by a spring 52 Whih impinges on bearing 28 and a loose 0011211 53, the latter being held against a colla1 54: fast 011 jmuna1 27. I (10 n0t limit ntlyself 130 the precise construction shown.

l. In a machine of the Fourdrinier type, an apron adapted t0 contact With suitable suchen boxes; a support for said apron at the c0uch end of said machine und forward of said boxes; am] means f01 transversely reciprocating said support to shake said apron from said c0uch end back over said boxes.

2. In a machine of the Fourdrinier type, an apron adapted t0 contact with suitable suc;tion boxes; a roll monnted in guiding relation t0 said apron at the couch end of said machine; and means for transversely reciprocating said roll to shake said apron from said couch end back over said boxes.

3. In a machine of the Fourdrinier type,

a plurality of suction boxes; an apron adaptec] t0 contact with said boxes; and means f01' transversely reciprocating said boxes; in cornbination with a support f01 said a1non at the couch end of said machine am] forward of said boxes; and means f0r transversely reciprocating said support (0 shake said apron f101n said couch end back 0ver said boxes.

4. A frame; a roll having journals at both ends; a fixed bea1ing for one 0f said journals und adapted to slidably and rotatably receive the same said bearing being fast 011 said frame; a journal box f01 the other of said journals and adapted t0 rotatably receive the same; means f0r preven*- ing said other journal fro1n sliding in sai%l box; und a movable support for said box; in combination With means for transversely reciprncating said movable support t0 impart reciprocating motion to said roll.

In testin1ony whereof, I have aflixed my signature in the presence of two witnesses.

ALBERT J. DAVIES.

Witnesses A. T. PALMER, WAI.LIS L. BURSEY. 

